Preparation method Rubber 6 Styrene 6 Styrene butadiene rubber 6 Blending 4 Butadiene rubber 4 Curing 4 Mechanical properties 4 Mixing 4 Polymer blends 4 Sulfenamides 4 Vulcanized compounds 4 Activation energy 2 Blend 2 Blend composition 2 Blends of elastomers 2 Butadiene 2 CO-PROX 2 COPROX 2 Calcination 2 Calcination temperature 2 Catalyst activity 2 Catalyst supports 2 Catalysts 2 Cell contraction 2 Cerium 2 Cerium compounds 2 Co-prox reactions 2 Composition ranges 2 Crosslinks 2